Question

CMSC 200 (Computer Programming - Java 10.0.2)

We'll say that a value is "everywhere" in an array if for every pair of adjacent elements in the array, at least one of the pair is that value. Return true if the given value is everywhere in the array.

Examples:

isEverywhere( [1, 2, 1, 3], 1 ) -> true

isEverywhere( [1, 2, 1, 3], 2 ) -> false

isEverywhere( [1, 2, 1, 3, 4], 1 ) -> false

Answer 1

public class Everywhere {

    public static boolean isEverywhere(int[] arr, int num) {
        for(int i = 0; i < arr.length-1; i++) {
            if(arr[i] != num && arr[i+1] != num) {
                return false;
            }
        }
        return true;
    }

    public static void main(String[] args) {
        System.out.println(isEverywhere(new int[]{1, 2, 1, 3}, 1));
        System.out.println(isEverywhere(new int[]{1, 2, 1, 3}, 2));
        System.out.println(isEverywhere(new int[]{1, 2, 1, 3, 4}, 1));
    }

}

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